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CH 6- section 1 Projectile Motion

Total questions: 45

Worksheet time: 38mins

Name
Class
Date
1.
What is the horizontal acceleration of a projectile?
a)
0 m/s2
b)
9.8 m/s2
2.
The shape of the path a projectile follows...
a)
circular
b)
linear
c)
wavy
d)
parabolic
3.
What is the vertical acceleration of a projectile?(neglect air resistance) 
a)
0 m/s2
b)
9.8 m/s2
4.

In a projectile motion we always have...

a)

1 component (x)

b)

3 components (x,y, and z)

c)

2 components (x and y)

d)

0 components

5.

A ball is thrown and follows the parabolic path shown above. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the same height above the ground. How do the speeds of the ball at the three points compare?

a)

vP < vQ < vR

b)

vR < vQ < vP

c)

vQ < vR < vP

d)

vQ < vR = vP

e)

vP = vQ < vR

6.

A ball is thrown and follows the parabolic path shown above. Air friction is negligible. Point Q is the highest point on the path. Points P and R are the same height above the ground. Which of the following diagrams best shows the direction of the acceleration of the ball at point P?

a)
b)
c)
d)
e)
7.

What variable letter is altitude or height?

a)

dx

b)

vx

c)

dy

d)

vy

8.
Does horizontal velocity change if you ignore air resistance?
a)
yes
b)
no
9.
Does vertical velocity change as a projectile rises and falls?
a)
yes 
b)
no
10.
If you throw a baseball straight up, what is its velocity at the highest point?
a)
9.8 m/s2
b)
9.8 m/s
c)
0 m/s2
d)
0 m/s
11.

What variable letter is range or horizontal displacement?

a)

dx

b)

vx

c)

dy

d)

vy

12.

What variable is vertical velocity?

a)

dx

b)

vx

c)

dy

d)

vy

13.

What variable is horizontal velocity?

a)

dx

b)

vx

c)

dy

d)

vy

14.

In the diagram, which letter represents the horizontal displacement d→x\overrightarrow{d}_x ?

a)

A

b)

B

c)

C

d)

D

15.

In the picture, cannonball A was launched at 10 m/s at 60°, and B was launched at 18 m/s at 25°. The cannonball that hit the ground first was

a)

A, because it had less total velocity.

b)

B, because it had more total velocity.

c)

A, because it had less initial vertical velocity.

d)

B, because it had less initial vertical velocity.

16.

A projectile is launched with a horizontal velocity of 20 m/s and an initial vertical velocity of 20 m/s. Which graph correctly shows the horizontal velocity of the projectile over time?

a)
b)
c)
d)
17.

A projectile is launched with a horizontal velocity of 20 m/s and an initial vertical velocity of 20 m/s. Which graph correctly shows the vertical position of the projectile over time?

a)
b)
c)
d)
18.

A projectile is launched, and its vertical and horizontal velocities are shown in the graph. What is the magnitude of the projectile's initial velocity?

a)

25 m/s

b)

10 m/s

c)

325 m/s

d)

18 m/s

19.
Velocity is different from speed in that velocity is speed in a given direction.
a)
True
b)
False
20.
What force acts in the y direction that causes an object to travel in a parabolic arc?
a)
Friction
b)
Gravity
c)
Tension
d)
No force acting.
21.
An example of projectile motion is...
a)
a golf ball being hit
b)
a rocket
c)
a water fountain
d)
all of the above
22.
Horizontal and vertical motions are ______ of each other
a)
dependent
b)
independent
23.
A projectile will accelerate downward because gravity is acting on it.
a)
vertical motion
b)
horizontal motion
c)
circular motion
d)
linear motion
24.

The initial horizontal velocity of a projectile is ____ its final horizontal velocity.

a)

less than

b)

equal to

c)

greater than

25.

If two projectiles are launched at two different heights, 2m and 10m, which one will reach the ground first?

a)

2m

b)

10m

c)

they both will hit the ground at the same time

26.

What is the velocity of an object launched straight up at its highest point?

a)

zero

b)

equal to its vx

c)

½ its maximum value

d)

equal to gravity

27.

A basketball that is thrown to the ring follows a path that is ______________.

a)

hyperbolic

b)

parabolic

c)

linear

d)

circular

28.

What happens to the horizontal velocity of a projectile as it travels along the curved path?

a)

increases

b)

decreases

c)

stays the same

d)

none of these

29.

What happens to the vertical velocity of a projectile as it goes up?

a)

increases

b)

decreases

c)

stays the same

d)

none of these

30.

What happens to the vertical velocity of a projectile as it goes down?

a)

increases

b)

decreases

c)

stays the same

d)

none of these

31.

What do you call the horizontal distance travelled by a projectile?

a)

path

b)

trajectory

c)

range

d)

parabola

32.

At what point is vy= 0 m/s?

a)

A

b)

B

c)

C

d)

D

e)

None of these points

33.

What is the vertical acceleration of a projectile due to gravity?

a)

-9.0 m/s

b)

-9.8 m/s

c)

-9.8 m/s2

d)

-9.08 m/s2

34.

At what angle should the projectile be fired to have a maximum range?

a)

00

b)

450

c)

900

d)

1800

35.

Which of the following affects the motion of a projectile in an ideal setting?

a)

mass of the object

b)

shape of the object

c)

gravitational force acting on the object

d)

volume of the object

36.

The path curve path taken by a projectile is called (a)   .

37.
In the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves. 
a)
True
b)
False
c)
Sometimes true
d)
Sometimes false
38.
In the absence of air friction, the vertical component of a projectile's velocity doesn't change as the projectile moves. 
a)
True
b)
False
c)
Sometimes true
d)
Sometimes false
39.

What happens to the horizontal velocity of a projectile as it goes up?

a)

It becomes zero.

b)

It remains the same.

c)

It decreases.

d)

It increases.

40.

What happens to the vertical velocity of a projectile as it goes down?

a)

It increases.

b)

It decreases.

c)

It remains the same.

41.

What happens to the vertical velocity of a projectile as it goes up?

a)

It increases.

b)

It decreases.

c)

It remains the same.

42.

At what angle should the projectile be fired to have a maximum range?

a)

00

b)

450

c)

900

d)

1800

43.

Who do you agree with?

a)

Anita: “A projectile’s vx changes because of gravity, and its vy remains constant.”

b)

Barry: “Both vx and vy are constant.”

c)

Chris: “A projectile has no acceleration in the vertical dimension but it does accelerate horizontally.”

d)

Dave: “A projectile has vertical acceleration and a constant horizontal velocity”

44.

The initial horizontal velocity of a projectile is ____ its final horizontal velocity.

a)

less than

b)

equal to

c)

greater than

45.

Once a projectile is launched, what is the only force that affects its motion?

a)

mass

b)

friction

c)

inertia

d)

gravity

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